[quote="Todd_Easton, post:5, topic:32339"]
Personally, I suspect that Joseph's tomb is somewhere on the outskirts of Nazareth but...
From catholictradition.org/litany9b.htm :
THE BODY AND TOMB OF ST. JOSEPH
"In an ecstasy, a saint has seen the body of St. Joseph preserved intact in a tomb, the site of which is yet unknown. The more the glorious spouse of the most Blessed Virgin Mary is honored, the sooner will the finding of his body take place, which will be a day of great joy for the Church." [Words of Fr. Paul of Moll, 1824-1896, from Father Paul of Moll, by Edward van Speybrouck, p. 238]
An ancient tradition states that the tomb of St. Joseph, now empty, is in the Valley of Josaphat. St. Jerome, on the other hand, was of the opinion that St. Joseph's tomb is within the boundaries of the Garden of Gethsemane. [Source: The Life and Glories of St. Joseph, by Edward H. Thompson, pp. 409-410]
At the time of Jesus, there two popular modes of burial: the method more popular with the poorer classes - which of course in those days meant the majority of the population - and some groups such as the Qumran community involved burying the body of the deceased (sometimes placed in a wooden coffin) in a trench grave, not unlike modern day grave cuts. After the pit was filled in, the grave was marked either by erecting a headstone or a pile of rocks at one or both ends, or simply pouring a mixture of lime/chalk and water over the backfill, so that people would recognize the presence of a burial - and thus avoid accidentally passing through it and becoming ritually impure as a result. Given the inconspicuous and highly flimsy nature of this type of grave, relatively few examples of this type of burial survives in the archaeological record.
The other available option was a burial cave, either natural or man-made (completely man-made burial complexes were more rare and costly than natural caverns), which were family affairs, unlike the individual trench graves: the bones of generations upon generations could all be interred in a single cave. The basic design of these rock-cut tombs consists of a square or rectangular room with benches on three sides of the chamber, leaving a pit in the middle, and a low, narrow doorway which could be closed with a blocking stone, which could be either a round disk which could be rolled over the entrance, or more commonly, square/rectangular 'plug-type' stones). Some tombs could be more elaborate - for instance, having multiple chambers, decorated with carvings, and whatnot. Around the time of Jesus you also had tombs with shelves cut into the walls of the interior: one type of shelf is called the arcosolia, which has a bench-like aperture (known as an arcosolium) with an arched ceiling hewn into the length of the wall. Another is the loculus or kokh, a narrow shaft running perpendicularly back from the chamber wall.
In this scenario, the body of the deceased would usually first be laid on the bench, a shelf (arcosolium) or on a niche (kokh) inside the burial chamber and left there, allowing the flesh to rot (the Jews did not practice embalming) until it has totally decomposed - something which is usually considered to occur within the space of a year. Sometimes the body could even be placed on a sort of coffin when it is placed on the shelf. This is what is known as primary burial. At the following year, once the flesh had decomposed, family members would return to the tomb and practice the continuation of the funerary rite known as secondary burial, which involves taking the bones and reinterring it in some way, either by depositing it in a specially-designated area somewhere inside the tomb or - more common at the time of Jesus - in stone boxes called ossuaries, which would then be also placed on a certain spot inside the burial chamber, in the loculi or on the benches.
We know that Jesus was buried in a newly-hewn burial cave that was not His, but we aren't sure about whether Jesus' family had one of their own back at Nazareth. If they did not, perhaps Jesus' earthly grandparents or great-grandparents were just buried in trench graves.